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// to you under the Apache License, Version 2.0 (the
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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use datafusion_expr::AggregateUDF;
use std::sync::Arc;

pub mod avg;
pub mod expr_fn {
    use datafusion_functions::export_functions;

    export_functions!((avg, "Returns the average value of a given column", arg1));
}

// TODO: try use something like datafusion_functions_aggregate::create_func!()
pub fn avg() -> Arc<AggregateUDF> {
    Arc::new(AggregateUDF::new_from_impl(avg::SparkAvg::new()))
}

pub fn functions() -> Vec<Arc<AggregateUDF>> {
    vec![avg()]
}
